Add 'ShowToastBrick'

[Danveyd]

Description

This PR introduces a new ShowToastBrick to the project. It allows users to display a short, temporary text message (Toast) on the screen. This is extremely useful for debugging projects or providing quick feedback to users.

In my fork (NewCatroid), this brick has proven to be very popular, so I decided to port it cleanly into the main repository.

Note to maintainers regarding Jira & Slack

I wanted to create a Jira ticket and ping you in Slack as per the Contributing Guidelines, but Jira throws 401 Unauthorized errors when trying to create an issue, and Slack requires a @tugraz.at email to join. Could someone please help me create a Jira ticket for this PR or let me know the correct workflow for external contributors?

• Include the name of the Jira ticket in the PR’s title
• Include a summary of the changes plus the relevant context
• Choose the proper base branch (develop)
• Confirm that the changes follow the project’s coding guidelines
• Verify that the changes generate no compiler or linter warnings
• Perform a self-review of the changes
• Verify to commit no other files than the intentionally changed ones
• Include reasonable and readable tests verifying the added or changed behavior
• Confirm that new and existing unit tests pass locally
• Check that the commits’ message style matches the project’s guideline
• Stick to the project’s gitflow workflow
• Verify that your changes do not have any conflicts with the base branch
• After the PR, verify that all CI checks have passed
• Post a message in the catroid-stage or catroid-ide Slack channel and ask for a code reviewer

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud